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Finding the Fourth Proportional to 19,216.78, 28,819.55 and 6,734.48

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Solution

The fourth proportional to 19,216.78, 28,819.55 and 6,734.48 is: 10,099.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,216.78 : 28,819.55 = 6,734.48 : x
  2. Step 2: Convert to fraction form
    19,216.78/28,819.55 = 6,734.48/x
  3. Step 3: Cross multiply
    19,216.78x = 28,819.55 × 6,734.48
  4. Step 4: Simplify right side
    19,216.78x = 194,084,683.08
  5. Step 5: Solve for x
    x = 194,084,683.08/19,216.78
  6. Step 6: Final answer
    x = 10,099.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.